x86: Use this_cpu_ops to optimize code

Go through x86 code and replace __get_cpu_var and get_cpu_var
instances that refer to a scalar and are not used for address
determinations.

Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index cdac9e592aa5..79d9606c202c 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -981,7 +981,7 @@ static inline u64 nsec_to_cycles(u64 nsec)
         if (kvm_tsc_changes_freq())
                 printk_once(KERN_WARNING
                  "kvm: unreliable cycle conversion on adjustable rate TSC\n");
-        ret = nsec * __get_cpu_var(cpu_tsc_khz);
+        ret = nsec * __this_cpu_read(cpu_tsc_khz);
         do_div(ret, USEC_PER_SEC);
         return ret;
 }
@@ -1066,7 +1066,7 @@ static int kvm_guest_time_update(struct kvm_vcpu *v)
         local_irq_save(flags);
         kvm_get_msr(v, MSR_IA32_TSC, &tsc_timestamp);
         kernel_ns = get_kernel_ns();
-        this_tsc_khz = __get_cpu_var(cpu_tsc_khz);
+        this_tsc_khz = __this_cpu_read(cpu_tsc_khz);
 
         if (unlikely(this_tsc_khz == 0)) {
                 local_irq_restore(flags);
@@ -4432,7 +4432,7 @@ EXPORT_SYMBOL_GPL(kvm_fast_pio_out);
 
 static void tsc_bad(void *info)
 {
-        __get_cpu_var(cpu_tsc_khz) = 0;
+        __this_cpu_write(cpu_tsc_khz, 0);
 }
 
 static void tsc_khz_changed(void *data)
@@ -4446,7 +4446,7 @@ static void tsc_khz_changed(void *data)
                 khz = cpufreq_quick_get(raw_smp_processor_id());
         if (!khz)
                 khz = tsc_khz;
-        __get_cpu_var(cpu_tsc_khz) = khz;
+        __this_cpu_write(cpu_tsc_khz, khz);
 }
 
 static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val,